AXIOMTEK PICO840, PICO842 User Manual

PICO840/842

Intel® AtomTM E3845/E3827
Intel® Celeron® J1900/N2807
Processors Pico-ITX Board

User’s Manual

ii

Disclaimers

This manual has been carefully checked and believed to contain accurate information.
Axiomtek Co., Ltd. assumes no responsibility for any infringements of patents or any third
party’s rights, and any liability arising from such use.

Axiomtek does not warrant or assume any legal liability or responsibility for the accuracy,
completeness or usefulness of any information in this document. Axiomtek does not make any
commitment to update the information in this manual.

Axiomtek reserves the right to change or revise this document and/or product at any time
without notice.

No part of this document may be reproduced, stored in a retrieval system, or transmitted, in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise,
without the prior written permission of Axiomtek Co., Ltd.

CAUTION

If you replace wrong batteries, it causes the danger of explosion. It is recommended by the
manufacturer that you follow the manufacturer’s instructions to only replace the same or
equivalent type of battery, and dispose of used ones.

Copyright 2015 Axiomtek Co., Ltd.

All Rights Reserved
September 2015, Version A2
Printed in Taiwan

iii

ESD Precautions

Computer boards have integrated circuits sensitive to static electricity. To prevent chipsets
from electrostatic discharge damage, please take care of the following jobs with precautions:

 Do not remove boards or integrated circuits from their anti-static packaging until you are

ready to install them.

 Before holding the board or integrated circuit, touch an unpainted portion of the system

unit chassis for a few seconds. It discharges static electricity from your body.

 Wear a wrist-grounding strap, available from most electronic component stores, when

handling boards and components.

Trademarks Acknowledgments

Axiomtek is a trademark of Axiomtek Co., Ltd.
Windows® is a trademark of Microsoft Corporation.

AMI is a trademark of American Megatrend Inc.
IBM, PC/AT, PS/2, VGA are trademarks of International Business Machines Corporation.

Intel® and Pentium® are trademarks of Intel Corporation.
Other brand names and trademarks are the properties and registered brands of their

respective owners.

iv

Table of Contents

Disclaimers ..................................................................................................... ii

ESD Precautions ........................................................................................... iii

Chapter 1 Introduction ............................................. 1

1.1 Features ............................................................................................... 2

1.2 Specifications ...................................................................................... 2

1.3 Utilities Supported .............................................................................. 3

Chapter 2 Board and Pin Assignments .................... 5

2.1 Board Dimensions and Fixing Holes ................................................. 5

2.2 Board Layout ....................................................................................... 7

2.3 Assembly Drawing .............................................................................. 9

2.4 Jumper and Switch Settings ............................................................ 12

2.4.1 LVDS Voltage Selection (JP1 and JP2) .................................................... 13

2.4.2 LVDS Brightness Control Mode Setting (JP4) .......................................... 13

2.4.3 Restore BIOS Optimal Defaults (JP5) ....................................................... 13

2.4.4 Auto Power On (SW1) ............................................................................... 13

2.5 Connectors ........................................................................................ 14

2.5.1 VGA Connector (CN1) ............................................................................... 15

2.5.2 HDMI Connector (CN2) ............................................................................. 15

2.5.3 DC Power Jack w/ Screw (CN3) ............................................................... 15

2.5.4 SMBus Connector (CN4) .......................................................................... 16

2.5.5 LVDS Connector (CN6) ............................................................................. 16

2.5.6 Power LED Header (CN7) ......................................................................... 18

2.5.7 SATA Power Connector (CN8) .................................................................. 18

2.5.8 External Speaker and Internal Buzzer Header (CN9) ............................... 18

2.5.9 Inverter Connector (CN10) ........................................................................ 18

2.5.10 Fan Power Connector (CN11) ................................................................... 19

2.5.11 Board to Board Connectors (CN12 and CN13) ......................................... 19

2.5.12 Ethernet Port (LAN1) ................................................................................. 20

2.5.13 SATA Connector (SATA1) .......................................................................... 20

2.5.14 CMOS Battery Connector (BAT1) ............................................................. 21

2.5.15 Full-size PCI-Express Mini Card and mSATA Connector (SCN1) ............. 21

Chapter 3 I/O Board ................................................ 23

3.1 AX93283 Specifications .................................................................... 23

3.2 AX93283 Dimensions and Fixing Holes .......................................... 23

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3.3 AX93283 Board Layout ..................................................................... 24

3.4 AX93283 Jumper Settings ................................ ................................ 25

3.4.1 COM1 Data/Power Selection (JP1 and JP2) ............................................ 25

3.5 AX93283 Connectors, Switches and LED ....................................... 26

3.5.1 System Reset Switch (CN1) ...................................................................... 26

3.5.2 Audio Jack (CN2) ...................................................................................... 26

3.5.3 COM1 Connector (CN3) ............................................................................ 27

3.5.4 COM2 Connector (CN4) ............................................................................ 27

3.5.5 System Power Switch (CN5) ..................................................................... 27

3.5.6 Board to Board Connectors (CN9 and CN10) ........................................... 28

3.5.7 USB Connectors (USB1 and USB2) ......................................................... 29

3.5.8 Power and HDD LED Indicator (D1) ......................................................... 29

Chapter 4 Hardware Description ........................... 31

4.1 Microprocessors ............................................................................... 31

4.2 BIOS ................................................................................................... 31

4.3 System Memory ................................................................................. 31

4.4 I/O Port Address Map ........................................................................ 32

4.5 Interrupt Controller (IRQ) Map ......................................................... 33

4.6 Memory Map ...................................................................................... 36

Chapter 5 AMI BIOS Setup Utility .......................... 37

5.1 Starting ............................................................................................... 37

5.2 Navigation Keys ................................................................................ 37

5.3 Main Menu .......................................................................................... 39

5.4 Advanced Menu ................................................................................. 40

5.5 Chipset Menu ..................................................................................... 52

5.6 Security Menu .................................................................................... 55

5.7 Boot Menu .......................................................................................... 56

5.8 Save & Exit Menu .............................................................................. 57

Appendix A Watchdog Timer ................................... 59

A.1 About Watchdog Timer ..................................................................... 59

A.2 How to Use Watchdog Timer ............................................................ 59

A.3 Sample Program ................................................................................ 60

Appendix B BIOS Flash Utility ................................ 63

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PICO840/842 Pico-ITX Board

Introduction 1

Chapter 1

Introduction

The PICO840 is a Pico-ITX board with Intel® AtomTM E3845/E3827 processors. Meanwhile
PICO842, a 3.5’ board, supports Intel® Celeron® J1900/N2807 processors. Both of them
deliver outstanding system performance through high-bandwidth interfaces, multiple I/O
functions for interactive applications and various embedded computing solutions.

The PICO840/842 have one 204-pin unbuffered SO-DIMM socket for DDR3L 1333/1066MHz
SO-DIMM memory, maximum memory capacity up to 8GB. It also features one Gigabit/Fast
Ethernet, one SATA port with transfer rates up to 3Gb/s, four USB 2.0 high speed compliant,
and built-in high definition audio codec that can achieve the best stability and reliability for
industrial applications. Additionally, it provides you with unique embedded features, such as
two serial ports in RS-232/422/485 and Pico-ITX form factor that applies an extensive array of
PC peripherals. The board can be enhanced by its built-in watchdog timer function, a special
industrial feature not commonly seen on other motherboards.

PICO840/842 Pico-ITX Board

2 Introduction

1.1 Features

 PICO840 - Intel

®

AtomTM quad core E3845 (1.91GHz) and dual core E3827 (1.75GHz)

 PICO842 - Intel

®

Celeron® quad core J1900 (2GHz) and dual core N2807 (1.58GHz)

 1 DDR3L SO-DIMM supports up to 8GB memory capacity
 4 USB 2.0 ports
 2 COM ports
 +12V only DC-in
 1 PCI-Express Mini Card w/ mSATA supported

1.2 Specifications

 CPU

 PICO840

- Intel® AtomTM quad core E3845 1.91GHz.

- Intel® AtomTM dual core E3827 1.75GHz.

 PICO842

- Intel® Celeron® quad core J1900 2GHz.

- Intel® Celeron® dual core N2807 1.58GHz

 Thermal Solution

 Fanless but with reserved fan connector.

 Operating Temperature

 PICO840: -40°C~70°C
 PICO842: -20°C~70°C.

 BIOS

 American Megatrends Inc. UEFI (Unified Extensible Firmware Interface) BIOS.
 16Mbit SPI Flash, DMI, Plug and Play.
 PXE Ethernet Boot ROM.

 System Memory

 One 204-pin unbuffered DDR3L SO-DIMM socket.
 Maximum up to 8GB DDR3L 1333/1066MHz memory.

 Onboard Multi I/O

 Controller: Fintek F81803U.
 Serial Ports: Two ports for RS-232/422/485.

 Serial ATA

 One SATA-300 connector.
 mSATA supported (Optional)

 USB Interface

 Four USB ports with fuse protection and complies with USB Spec. Rev. 2.0.

 Display

 A standard 15-pin D-Sub VGA connector which is co-layout with a HDMI connector.
 One 2x20-pin connector for 18/24-bit single/dual channel LVDS and one 8-pin

inverter connector. LVDS resolution is up to 1920x1200 in 24-bit dual channel.

PICO840/842 Pico-ITX Board

Introduction 3

 Trusted Platform Module (TPM)

 Controller: ST ST33TPM12LPC via LPC bus interface.
 Complies with TPM1.2 main and PC client specification.

 Watchdog Timer

 1~255 seconds or minutes; up to 255 levels.

 Ethernet

 One port with Intel

®

i210IT for Gigabit/Fast Ethernet.

 One RJ-45 connector.

 Audio

 HD audio compliant with Realtek ALC662.
 MIC-in and line-out.

 Expansion Interface

 One full-size PCI-Express Mini Card socket complies with PCI-Express Mini Card

Spec. V1.2.

 Power Input

 DC power jack connector, co-layout with 1x2-pin right angle connector.
 +12V only DC-in.
 AT auto power on function supported.

 Power Management

 ACPI (Advanced Configuration and Power Interface).

 Form Factor

 Pico-ITX form factor.

Note

All specifications and images are subject to change without notice.

1.3 Utilities Supported

 Chipset and graphics driver
 Ethernet driver (i210IT)
 Audio driver
 Trusted Execution Engine
 Sideband Fabric Device

PICO840/842 Pico-ITX Board

4 Introduction

This page is intentionally left blank.

PICO840/842 Pico-ITX Board

Board and Pin Assignments 5

Chapter 2

Board and Pin Assignments

2.1 Board Dimensions and Fixing Holes

Top View

PICO840/842 Pico-ITX Board

6 Board and Pin Assignments

Bottom View

Side View

PICO840/842 Pico-ITX Board

Board and Pin Assignments 7

2.2 Board Layout

Top View

Side View

PICO840/842 Pico-ITX Board

8 Board and Pin Assignments

SSODIMM1

SCN1

Bottom View

PICO840/842 Pico-ITX Board

Board and Pin Assignments 9

2.3 Assembly Drawing

Heatsink for PICO840/842 (see image below):

First of all, use the following four screws to secure heatsink on heatspreader.

x4

PICO840/842 Pico-ITX Board

10 Board and Pin Assignments

For thermal dissipation, a heatspreader enables the PICO840/842’s components to dissipate
heat efficiently. Images below illustrate how to install the heat spreader.

Installing Heatspreader

The PICO840/842 has four assembly holes for installing heatspreader plate. Align and firmly
secure the heatspreader plate to the PICO840/842. Be careful not to over-tighten the screws.

x4 x4 x4

PICO840/842 Pico-ITX Board

Board and Pin Assignments 11

Installing Heatspreader and AX93283 I/O Board

Gently insert I/O board into CN12 and CN13. Align and firmly secure the heatspreader plate
and I/O board to PICO840/842. Be careful not to over-tighten the screws. See chapter 3 for
more details of AX93283 I/O board.

x4 x2 x2 x4

PICO840/842 Pico-ITX Board

12 Board and Pin Assignments

2.4 Jumper and Switch Settings

Jumper is a small component consisting of jumper clip and jumper pins. Install jumper clip on 2
jumper pins to close. And remove jumper clip from 2 jumper pins to open. Below illustration
shows how to set up jumper.

Properly configure jumper and switch settings on the PICO840/842 to meet your application
purpose. Below you can find a summary table of jumpers, switch and onboard default settings.

Note

Once the default jumper or switch setting needs to be changed, please do it under
power-off condition.

Jumper and Switch

Description

Setting

JP1

LVDS +12V Voltage Selection
Default: N/A

1-2 Open

JP2

LVDS +3.3V/+5V Voltage Selection
Default: +3.3V

1-2 Close

JP4

LVDS Brightness Control Mode Setting
Default: PWM Mode

1-2 Close

JP5

Restore BIOS Optimal Defaults
Default: Normal Operation

1-2 Close

SW1

Auto Power On
Default: Disable

1-2 Close

PICO840/842 Pico-ITX Board

Board and Pin Assignments 13

2.4.1 LVDS Voltage Selection (JP1 and JP2)

The board supports voltage selection for flat panel displays. Use these jumpers to set
LVDS connector (CN6) pin 1~6 VCCM to +3.3V, +5V or +12V. To prevent hardware
damage, before connecting please make sure that input voltage of flat panel is correct.

JP1

JP2

2.4.2 LVDS Brightness Control Mode Setting (JP4)

The JP4 enables you to select PWM or voltage control mode for inverter connector
(CN10). These two control modes are for adjusting the brightness of LVDS panel.

2.4.3 Restore BIOS Optimal Defaults (JP5)

Put jumper clip to pin 2-3 for a few seconds then move it back to pin 1-2. Doing this
procedure can restore BIOS optimal defaults.

2.4.4 Auto Power On (SW1)

If SW1 is enabled for power input, the system will be automatically power on without
pressing soft power button. If SW1 is disabled for power input, it is necessary to
manually press soft power button to power on the system.

Function

JP1 Setting

+12V level

Close

N/A

Open

Function

JP2 Setting

+3.3V level (Default)

1-2 close

+5V level

2-3 close

Function

Setting

PWM mode (Default)

1-2 close

Voltage mode

3-4 close

Function

Setting

Normal (Default)

1-2 close

Restore BIOS optimal defaults

2-3 close

Function

Setting

Disable auto power on (Default)

1-2 close

Enable auto power on

2-3 close

PICO840/842 Pico-ITX Board

14 Board and Pin Assignments

2.5 Connectors

Signals go to other parts of the system through connectors. Loose or improper connection
might cause problems, please make sure all connectors are properly and firmly connected.
Here is a summary table which shows all connectors on the hardware.

Connector

Description

CN1

VGA Connector

CN2

HDMI Connector

CN3

DC Power Jack w/ Screw

CN4

SMBus Connector

CN6

LVDS Connector

CN7

Power LED Header

CN8

SATA Power Connector

CN9

External Speaker and Internal Buzzer Header

CN10

Inverter Connector

CN11

Fan Power Connector

CN12

40-pin Board to Board Connector

CN13

20-pin Board to Board Connector

LAN1

Ethernet Port

SATA1

SATA Connector

BAT1

CMOS Battery Connector

SCN1

Full-size PCI-Express Mini Card and mSATA Connector

SSODIMM1

DDR3L SO-DIMM Connector

PICO840/842 Pico-ITX Board

Board and Pin Assignments 15

2.5.1 VGA Connector (CN1)

The CN1 is a standard 15-pin D-Sub connector which is co-layout with HDMI connector
(CN2). It is commonly used for VGA display. This VGA interface configuration can be
configured via software utility.

2.5.2 HDMI Connector (CN2)

The HDMI (High-Definition Multimedia Interface) is a compact digital interface which is
capable of transmitting high-definition video and high-resolution audio over a single
cable.

2.5.3 DC Power Jack w/ Screw (CN3)

The CN3 is a DC power jack with screw. Firmly insert at
least 60W adapter into this connector. Loose connection
may cause system instability and make sure all
components/devices are properly installed before
connecting this power jack

Pin

Signal

Pin

Signal

1

RED

2

GREEN

3

BLUE

4

N.C 5 GND

6

CRT_DETE

7

GND

8

GND

9

CRT_VCC

10

GND

11

N.C

12

DDC_DATA

13

Hsync

14

Vsync

15

DDC_CLK

Pin

Signal

Pin

Signal

1

HDMI OUT_DATA2+

2

GND

3

HDMI OUT_DATA2-

4

HDMI OUT_DATA1+

5

GND

6

HDMI OUT_DATA1-

7

HDMI OUT_DATA0+

8

GND

9

HDMI OUT_DATA0-

10

HDMI OUT_Clock+

11

GND

12

HDMI OUT_Clock-

13

N.C.

14

N.C.

15

HDMI OUT_SCL

16

HDMI OUT_SDA

17

GND

18

+5V

19

HDMI_HTPLG

PICO840/842 Pico-ITX Board

16 Board and Pin Assignments

2.5.4 SMBus Connector (CN4)

This connector is for SMBus (System Management Bus) interface.

2.5.5 LVDS Connector (CN6)

This board has a 2x20-pin connector for LVDS LCD interface. It is strongly
recommended to use the matching JST SHDR-40VS-B connector for LVDS interface.
Pin 1~6 VCCM can be set to +3.3V, +5V or +12V by setting JP2 or JP1 (see section

2.4.1).

18-bit single channel

Pin

Signal

1

SMBus clock

2

SMBus data

3

GND

Pin

Signal

Pin

Signal

1

VCCM

2

VCCM

3

VCCM

4

VCCM

5

VCCM

6

VCCM

7

N.C 8 N.C 9 GND

10

GND

11

N.C

12

N.C

13

N.C

14

N.C

15

GND

16

GND

17

N.C

18

N.C

19

N.C

20

N.C

21

GND

22

GND

23

Channel A D0-

24

N.C

25

Channel A D0+

26

N.C

27

GND

28

GND

29

Channel A D1-

30

N.C

31

Channel A D1+

32

N.C

33

GND

34

GND

35

Channel A D2-

36

Channel A CLK-

37

Channel A D2+

38

Channel A CLK+

39

GND

40

GND